[PATCH 11/14] afs: inode: Replace rcu_assign_pointer() with RCU_INIT_POINTER()

From: David Howells
Date: Fri Feb 24 2017 - 08:18:02 EST


From: Andreea-Cristina Bernat <bernat.ada@xxxxxxxxx>

The use of "rcu_assign_pointer()" is NULLing out the pointer.
According to RCU_INIT_POINTER()'s block comment:
"1. This use of RCU_INIT_POINTER() is NULLing out the pointer"
it is better to use it instead of rcu_assign_pointer() because it has a
smaller overhead.

The following Coccinelle semantic patch was used:
@@
@@

- rcu_assign_pointer
+ RCU_INIT_POINTER
(..., NULL)

Signed-off-by: Andreea-Cristina Bernat <bernat.ada@xxxxxxxxx>
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
---

fs/afs/inode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index 8f4e70566e44..5707272adf18 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -447,7 +447,7 @@ void afs_evict_inode(struct inode *inode)

mutex_lock(&vnode->permits_lock);
permits = vnode->permits;
- rcu_assign_pointer(vnode->permits, NULL);
+ RCU_INIT_POINTER(vnode->permits, NULL);
mutex_unlock(&vnode->permits_lock);
if (permits)
call_rcu(&permits->rcu, afs_zap_permits);